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In the real mode, the memory that is reserved for interrupt vector table is

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In the real mode, the memory that is reserved for interrupt vector table is

(a) first 2 KB of memory

(b) first 1 KB of memory

(c) last 2 KB of memory

(d) last 1 KB of memory

The question was asked in unit test.

This is a very interesting question from Real Addressing Mode topic in chapter 80286-80287-A Microprocessor with Memory Management and Protection of Microprocessor

1 Answer

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by (49.2k points)
The correct option is (b) first 1 KB of memory

Easy explanation: In the real mode, the first 1 Kbyte of memory starting from the address 00000H to 003FFH, is reserved for interrupt vector table.

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